Right but my point was even with the likes of Terry, Carvalho, Ivanovic, Alex, Ballack, Drogba, etc. We conceded loads of goals under Ancelotti from set pieces given the zonal marking approach, when the players were so used to Mourinho's tight marking tactic.
The fact this wasn't an issue under Conte or Sarri, along with what I've witnessed this season, has me believing it is more to do with coaching than who we have at our disposal.
It's virtually every time there's a set piece now, the opposition has a chance at goal.